using Microsoft.AspNetCore.Mvc;
using MistoxWebsite.Server.Controllers.Payment;
using MistoxWebsite.Server.Services.DatabaseService;
using MistoxWebsite.Shared.Database;
using Stripe;

namespace MistoxWebsite.Server.Controllers {
    [ApiController]
    public class PaymentController : ControllerBase {

        DatabaseService _databaseService;

        public PaymentController( DatabaseService databaseService ) {
            _databaseService = databaseService;
        }

        // Charges
        [Route( "api/getCheckoutToken" )]
        [HttpPost]
        public async Task<string> GetPaymentKey( [FromQuery] string userID ) {

            string OrderNumber = Guid.NewGuid().ToString().Substring(0,10);
            Shared.Database.Account? acc = await _databaseService.GetAccount(userID);
            if (acc != null) {
                List<Cart> cart = await _databaseService.GetCart(acc);

                IPayment PaymentPlugin = new StripeIntent(_databaseService);

                (bool, string) PaymentResponse = await PaymentPlugin.Purchase(OrderNumber, acc, cart);
                if (PaymentResponse.Item1) {
                    return PaymentResponse.Item2;
                }
                else {
                    Console.WriteLine("An error has occured in the payment plugin\n\n");
                    Console.WriteLine(PaymentResponse.Item2);
                    Console.WriteLine("\n");
                    return "0";
                }

            }
            return "0";
        }

        [Route( "/api/payment/response" )]
        [HttpPost]
        public async Task<IActionResult> paymentWebhook() {
            try {
                const string endpointSecret = "whsec_HCO7uv2BPIPmUPOiSg9tfwLZul8usCGG";
                string body = await new StreamReader(Request.Body).ReadToEndAsync();
                Event e = EventUtility.ConstructEvent( body, Request.Headers["Stripe-Signature"], endpointSecret );
                if( e.Type == "payment_intent.succeeded" ) {

                    // Extract Data from payment confirm
                    PaymentIntent intent = (PaymentIntent)e.Data.Object;
                    string orderNumber = "";
                    int userID = 0;
                    List<int> productIDs = new List<int>();
                    int subtotal = 0;
                    int total = 0;

                    KeyValuePair<string, string>[] y = intent.Metadata.ToArray();
                    foreach( KeyValuePair<string, string> cur in y ) {
                        string val = cur.Key;
                        if( val == "ordernumber" ) {
                            orderNumber = cur.Value;
                        } else if( val == "user" ) {
                            userID = int.Parse( cur.Value );
                        } else if( val == "products" ) {
                            string[] products = cur.Value.Split(',');
                            foreach( string product in products ) {
                                if ( !string.IsNullOrEmpty(product) ) {
                                    productIDs.Add( Convert.ToInt32( product ) );
                                }
                            }
                        } else if( val == "subtotal" ) {
                            subtotal = int.Parse( cur.Value );
                        } else if( val == "total" ) {
                            total = int.Parse( cur.Value );
                        }
                    }

                    // Clear the cart
                    Shared.Database.Account account = new() {
                        ID = userID
                    };
                    await _databaseService.ClearCart( account );

                    // Add data to misox receipt
                    for( int i = 0; i < productIDs.Count; i++ ) {
                        int product = productIDs[i];
                        await _databaseService.NewReceipt( new Receipt {
                            AccountID = userID,
                            ProductID = product,
                            ReceiptID = orderNumber,
                            Time = DateTime.Now,
                            TaxAmount = total - subtotal,
                            TotalCost = total,
                            LineItem = i
                        } );
                    }
                } else {
                    Console.WriteLine( "Unhandled event type: {0}", e.Type );
                }
                return Ok();
            } catch( Exception ex ) {
                return Content(ex.ToString());
            }
        }

    }

}